Regular wave making method for seaplane landing numerical simulation

A seaplane and numerical simulation technology, which is applied in design optimization/simulation, CAD numerical modeling, electrical digital data processing, etc., can solve the problems of easy interruption of calculation due to accumulated errors, time-consuming wave making, and large error of wave parameters. Achieve the effects of reducing calculation time, improving calculation efficiency, and improving calculation accuracy

Pending Publication Date: 2022-01-14
中航通飞华南飞机工业有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this wave-making method are obvious: wave-making takes a lot of time; the error of the obtained wave parameters is relatively large; the influence of accumulated errors in the wave-making calculation process is easy to interrupt the calculation

Method used

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  • Regular wave making method for seaplane landing numerical simulation
  • Regular wave making method for seaplane landing numerical simulation
  • Regular wave making method for seaplane landing numerical simulation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Example 1. A regular wave generation method for numerical simulation of seaplane landing, such as Figure 1-4 As shown, the specific steps are as follows:

[0040] Step 1. Establish a "solid-liquid-gas" coupled numerical simulation model based on the overall shape of the seaplane, the speed of water landing, and the required calculation of the water gliding distance. The grid unit is ALE unit or EULER unit, and the grid size of the water landing area is optimized;

[0041] Step 2. According to the weight characteristics of the seaplane, assign mass characteristic data to the seaplane, define the coupling relationship of "aircraft-water body-air", and define fluid boundary conditions;

[0042] Step 3. Define the seaplane's initial water landing speed and output items (mainly acceleration, displacement, and coupled pressure output), and use the ALE method or EULER method to establish a numerical simulation calculation model for the seaplane's hydrostatic landing;

[00...

Embodiment 2

[0048] Example 2. A regular wave wave-making method used in the numerical simulation calculation of seaplane regular wave landing, see Figure 1-4 Combining the characteristics of the numerical simulation modeling method of hydrostatic landing of a seaplane and the mathematical description method of regular waves, the specific steps are as follows:

[0049] Step 1: Establish a numerical simulation model of hydrostatic landing of a seaplane according to requirements

[0050] Considering the gliding distance of the seaplane after landing on the wave surface, a "solid-liquid-gas" coupling seaplane numerical simulation model for still water landing is established. The simulation model includes the seaplane structure model, water fluid model and air model. By optimizing the modeling parameters, the numerical simulation accuracy of seaplane landing in still water can meet the engineering requirements.

[0051] Step 2: Calculation of initial regular wave wave shape in the numerical...

Embodiment 3

[0063] Example 3. A regular wave wave-making method for numerical simulation of seaplane landing, see Figure 1-Figure 4 , including the following steps:

[0064] a. Construct a numerical simulation model of hydrostatic landing of a seaplane;

[0065] B. design the initial regular wave wave form on the still water landing simulation model;

[0066] c. Kinetic energy assignment is performed on the particles in the static water landing simulation model with the designed initial regular wave shape to form a seaplane regular wave landing simulation model.

[0067] In the aforementioned step a, the principle of constructing the numerical simulation model of hydroplane landing in still water is as follows: considering the gliding distance of the aircraft after landing on the wavy water surface, a numerical simulation model of hydroplane landing in still water coupled with "solid-liquid-gas" is established.

[0068] In the aforementioned step a, the method for constructing the num...

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Abstract

The invention discloses a regular wave making method for seaplane landing numerical simulation. The method comprises the following steps: a, constructing a seaplane still water dampening numerical simulation model; b, designing an initial regular wave form on the still water dampening simulation model; and c, carrying out kinetic energy assignment on mass points in the still water dampening simulation model of which the initial regular wave form is designed to form a seaplane regular wave dampening simulation model. According to the method, the dampening numerical simulation calculation efficiency and precision of the seaplane on the regular waves can be greatly improved.

Description

technical field [0001] The invention belongs to the technical field of simulation calculation of liquid wave dynamic characteristics in the numerical simulation of fluid-solid coupling of structure entering water, and in particular relates to a regular wave wave-making method for numerical simulation of seaplane landing. Background technique [0002] The numerical simulation analysis of seaplane landing belongs to a kind of fluid-solid coupling simulation analysis of structure entering water. In terms of analysis technology, after years of development, from the initial numerical simulation analysis of seaplane landing in still water, to the numerical simulation analysis of regular wave landing and irregular wave landing numerical simulation analysis, the model modeling is becoming more and more complex. The number of grids is getting larger and larger, so that the amount of calculation increases sharply, and the practicability of numerical simulation is greatly restricted. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/15G06F30/23G06F30/28G06F111/10G06F113/08G06F119/14
CPCG06F30/15G06F30/23G06F30/28G06F2111/10G06F2113/08G06F2119/14
Inventor 杨仕福吕继航曾毅
Owner 中航通飞华南飞机工业有限公司
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